make some operator functions const

diff --git a/lib/base/eptrlist.h b/lib/base/eptrlist.h
index 7e7a45a..7512305 100644 (file)
--- a/lib/base/eptrlist.h
+++ b/lib/base/eptrlist.h
@@ -58,8 +58,8 @@ public:
        inline const T* last() const;
 
 // added operator methods
-       inline operator bool();
-       inline bool operator!();
+       inline operator bool() const;
+       inline bool operator!() const;
 
 // added compare struct ... to sort
        struct less;
@@ -623,14 +623,14 @@ struct ePtrList<T>::less
 
 /////////////////// ePtrList operator bool ////////////////////
 template <class T>
-ePtrList<T>::operator bool()   
+ePtrList<T>::operator bool() const
 {
 //     Returns a bool that contains true, when the list is NOT empty otherwise false
        return !std::list<T*>::empty(); 
 }
 
 template <class T>
-bool ePtrList<T>::operator!()  
+bool ePtrList<T>::operator!() const
 {
 //     Returns a bool that contains true, when the list is empty otherwise false
        return std::list<T*>::empty();  
@@ -687,8 +687,8 @@ public:
        inline const T* last() const;
 
 // added operator methods
-       inline operator bool();
-       inline bool operator!();
+       inline operator bool() const;
+       inline bool operator!() const;
 
 // added compare struct ... to sort
        struct less;
@@ -1233,14 +1233,14 @@ struct eSmartPtrList<T>::less
 
 /////////////////// eSmartPtrList operator bool ////////////////////
 template <class T>
-eSmartPtrList<T>::operator bool()      
+eSmartPtrList<T>::operator bool() const
 {
 //     Returns a bool that contains true, when the list is NOT empty otherwise false
        return !std::list<T>::empty();  
 }
 
 template <class T>
-bool eSmartPtrList<T>::operator!()     
+bool eSmartPtrList<T>::operator!() const
 {
 //     Returns a bool that contains true, when the list is empty otherwise false
        return std::list<T>::empty();